Bracelet



J 1930- F. w. BOPP ET AL BRACELET Filed Feb. 20, 1929 ATIUHNE Y:

Patented Jan. 21, 1930 UNITED STATES PATENT OFFICE FREDERICK WILLIAM BOPP, OF PROVIDENCE, AND KARL LUDWIG VOLK, OF NOR- WOOD, RHODE ISLAND, ASSIG-NORS TO AMERICAN JEWELRY CHAIN COMPANY INCORPORATED, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF RHODE ISLAND BRACELET Application filed February 20, 1929.

Our invention has reference to an improvement in the art of jewelry and more particularly to an improvement in watch bracelets constructed of metal, which may be of any kind desired.

The object of our invention is to nnprove the construction of such a watch bracelet, whereby, the bracelet is of a helical spring construction, a pleasing and novel deslgn in Watch bracelets is produced and the cost of manufacturing the bracelet is reduced to a minimum.

Our invention consists in the peculiar and novel construction of a watch bracelet, said watch bracelet having details of construction, as will be more fully set forth hereinafter and claimed.

Figure 1 is an.edge view of our improved bracelet in approximately the position it would assume when in use.

Figure 2, is an inner face view of one end portion of the bracelet in a flattened out position, to more clearly show its construction, both ends of the bracelet being constructed alike.

Figure 3 is a longitudinal sectional view through the snap hook end and part of the body of the bracelet, taken on line 3, 3, of Figure 2.

Figure 4 is a transverse sectional men] through the bracelet, taken on line 4:, 4, of Figure 2, and

Figure 5, is a perspective view of a portion of the S shaped strip of metal of which the body of the bracelet is formed.

Figure 1 is enlarged and Figures 2, 3, 4 and 5, are greatly enlarged to more clearly show our new and novel construction of the bracelet.

In the drawing 6, indicates the body of the bracelet and 7, 7, the snap hooks on the ends of the bracelet body 6, and secured to the ends of the body 6, as will be hereinafter described.

The body 6, of the bracelet is constructed of a flexible nonelastic strap shaped metal fabric. The strap shaped body part, of the bracelet is formed of a corrugated strip of metal 9, approximately S shaped in cross section and having the longitudinal edges 10 Serial No. 341,454.

and 11, which extend from the ends of the letter S, a longitudinal top corrugated portion 12, having an under longitudinal groove 13, and a longitudinal bottom corrugated portion 14, having a top longitudinal groove 15.

The corrugated strip of metal 9, is wound helically around a flat mandrel the interior shape and size of the bracelet, so that the edge 10, of the strip 9, extends over and into the top groove 15, of the strip 9, as shown in Figure This operation is continual until any length required of bracelet body stock is obtained. It is then cut up into bracelet body lengths as required.

By this construction the entire length of the bracelet body 6, has formed on it a continuous series of external corrugations 16, 16, made from the corrugated portion 12, of the strip 9. The bracelet body 6 is in the form of a helical spring which may be ex panded nearly the width of the grooves 13 and 15, and which will contract into its closed position, as shown in Figure 3.

Each snap hook 7, is formed of sheet metal to have a flat tubular end 17, shaped first to slip over the end of the bracelet body 6, a hook shaped end 18, and a spring tongue 19, as shown in Figures 1, 2 and 3. The end portion of the bracelet body 6, with the snap hook tubular end 17, on it, is placed between corresponding corrugated dies and the tubular end 17 of the snap hook '7, compressed onto the end portion of the body member 6, thereby locking the snap hook tubular end 17, onto the end portion of the bracelet by forming coinciding corrugations 20, 20, on the end 17, of the snap hook 7 over the under corrugations 16, 16, of the bracelet body 6, and these corrugations 20, 20, form a continuation of the corrugations 16, 16, on the body 6, of the bracelet, as shown in Figures 2 and 3.

By this construction and when in use, there is the required amount of elasticity in the body 6, of the bracelet, the snap book ends 7 7, are positively secured or locked to the ends of the bracelet body 6, without soldering, the bracelet has a very pleasing effect to the eye and as it has only three parts, it can be manufactured at a minimum cost.

We do not confine ourselves to the exact construction shown of the strip of metal 9, as this can be made plain, engraved or embossed and the letter S shape of the metal strip may be varied in form, so as to produce different effects of the corrugations on the bracelet.

Having thus described our invention we claim as new 1. A bracelet body constructed of one strip of metal 5 shaped in cross section and having corrugations extending lengthwise of the strip, the strip of metal being wound on itself and forming a spring bracelet body with external corrugations, snap books on the ends of the bracelet and having corrugations coin ciding with the corrugations on the bracelet. 2. A bracelet body constructed of one strip of metal S shaped in cross section, corrugations and grooves extending longitudinally of the strip, the stri being helically wound on itself with the edges of the corrugations extending into the grooves of adjacent wound portions of the strip, and forming a spring racelet body with external corrugations extending at an angle across the bracelet body, snag hooks on each end of the bracelet body, eac snap hook having an external corrugated portion extending over the end portions of the bracelet, the corrugations on the snap hook coinciding with the corrugations on the bracelet, and forming a continuation of the corrugations on the bracelet, said corrugated portion of the snap hook being compressed onto the corrugated end portions of the bracelet body, thereby securing the snap hooks to the bracelet body, for the purpose as described.

In testimony whereof, we have signed our names to this specification. FREDERICK WILLIAM BOP P. KARL LUDWIG VOLK. 

